Scaffold-hoist.



E. I. GOLDEN.

SCAFFOLD HOIST. APPllCATlON FILED JUNE 26. 1915.

l, 1 9%., K 2% u Patented Sept. 12, 1916.

2 SHEETSSHEET I.

.E. J. GOLDEN.

SCAFFOLD HOIST.

APPLICATION FILED JUNE 26. 1915.

Patented Sept. 12,1916.

2 SHEETSQSHEET 2 with s EDWARD J. GOLDEN, OF CHICAGO, ILLINOIS, ASSIGNOR T CHICAGO SCAFFOLD COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SCAFFOLD-HOI-ST.

Application filed June 26, 1915.

To all whom it may concern:

Be it known that I, EDWARD J. GOLDEN, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Scaffold- Hoists, of which the following is a specification.

My invention relates to improvements in exterior scaffold hoists, and has for its object the production of a device of this character which will be of durable and economical construction, one which may be readily and easilynpplied and one which will be eflicient in use.

ments of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part'of this specification, and in which, 1

Figure 1 is a front elevation of a scaffold hoist embodying the invention, showing the same applied for use, Fig. 2 is a section taken on line of Fig. 1, Fig. 3 is a sectional side elevation of the construction shown in Fig. 1, Fig. 4 is an enlarged end view of the drum included in the construction, and Fig. 5 is a section taken on line I 7 of Fig. 4.

The preferred form' of construction, as illustrated-in the drawings comprises a body 1 in the form of a substantially U-shaped strap. Said strap is adapted to engage under the bolts 2 which connect the transversely disposed angle irons 3 upon which the platform boards or planks 4 are mounted. In order to prevent slipping of adjacent ends of the boards 4 from engagement with the supporting'members 3, the contiguous ends of adjacent boards are connected by a plate 5 which is secured to said boards by nails or other suitable securing devices 6. The outer end of the plate 5 is channel formed for engagement with one side of the body 1, said body thus servingas a means of locking the plate 5 against rela- Specification of Letters Patent.

Patented Sept. 12, 1916.

Serial No. 36,520.

tive movement and hence the platform boards 1 against relative shifting from engagement with the supporting members 3.

Mounted in the body 1 is a transversely extending shaft 7 secured in position against longitudinal movement by cotter pins 8. Loosely mounted upon the shaft 2 is a flanged drum 9 upon which is adapted to be wrapped a cable 10. Upon one side of the drum 9 is formed a pocket 9' the bottom of which communicates with the periphery of the core of the drum by means of an inclined passage 9". WVith this arrange- .ment the inner end of the cable 10 may be securely fastened to the drum by passing the same through the passage 9 into the pocket 9 and then pouring solder into said pocket to securely anchor the end hf the cable therein.

The upper ends of the sides of the body 1 are connected together by studs 11 and 12 with the ends of which cooperate nuts 13 and 14 respectively. The nuts 13 are formed with eyes or loops in order to adapt the same to accommodate the cables which serve in the capacity of a guard rail for the platform of the scaffold when the latter is in use. Both ends of the stud 11 are provided with nuts of the eye or loopconstruction so that no matter what side of the device is outermost, the same will be adapted to accommodate the guard cable.

Mounted upon the studs 11 and 12 are sleeves l5 and 16 respectively, the sides of the body 1 being clamped between the nuts 13 and the ends of sleeve 15. The sleeve 16 is of a length slightly less than the sleeve in order to permit of free rotary movement of the former for a purpose hereinafter set forth. Loosely mounted upon the sleeve 15 is a channel pulley 17 adapted to cooperate with the cable 10 in order to prevent rubbing of the same against the sleeve 15' in the winding and unwinding of said cable.

' Fixed to the sleeve 16 is a pawl 18 adapted for coeperation with ratchet teeth 19 formed upon one side ofthe drum 9, said pawl and ratchet teeth being so arranged as to be adapted normally to prevent retrograderotation' ofsaid drum. Also formed upon the drum 9 at the same side thereof as the ratchet teeth 19 are teeth or stops 20 with which cooperates a lever 21 which is rockingly mounted upon the shaft 7. The

outer end of lever 21 is embraced by an extension handle 22 in the form of a; tube which-embraces the outer end of said lever, as clearly shown in Fig. 3. Cooperating with the inner end of lever 21 is a helical compression spring 23 which serves to normally press said lever against the adjacent side of drum 9 and into engagement with the teeth 20. With this arrangement, it will be seen that the drum 9 may be intermittently rotated to effect winding of the cable thereon and hence to effect elevation of the scaffold, by simply oscillating the lever 21. When this is done, it will be seen that the lever 21 engaging with one of the teeth. 20 will serve to rotate the drum, the latter being held in the position to which the same is rotatably advanced by the pawl 18. Upon upward or return rocking of said lever, the same will slide over the teeth 20 by reason of the inclined formation of the rearward sides of the latter. Thusintermittent rotation of the drum is effected by simply oscillating the lever 21. The spring 23 servesof course to yieldingly hold the lever 21 in operative position relative to the teeth 20,

' said spring permitting of outward yielding of said lever upon return or upward oscillation thereof in sliding over said teeth, as above mentioned.

When it is desired to lower the scaffold, it is only necessary to release the pawl 18 from the ratchet teeth 19, by simply rocking said pawl upwardly, said pawl being rocked upwardly through engagement directly therewith on with the sleeve 16 which carries said pawl. When this is done the entire weight of the scaffold will be borne by the lever 21 engaging with one of the teeth 20. This being so, lowering of the scaffold is effected by simply rocking the lever 21 upwardly from a lowered position of said lever. When the lever has been rocked to elevated position, the pawl 18 is again engaged with one of the teeth 19, whereupon the lever is again swung downwardly to secure a fresh hold upon another of the teeth 20, whereupon the operation is repeated. Thus the drum is permitted to intermittently rotate in a retrograde direction in order to effect unwinding of the cable. The yielding influence of the spring23 upon lever 21 of course permits of slight outward rocking of the outer end of the latter in order to carry the same out of the path of theteeth 20 in the downward swinging of said lever during the scaffold lowering operation, as just described.

The hoist is connected with the supporthcopies of this patent may be obtained for ing framework 24 which cooperates with the scaffold, by engagement with depending rods 25 of said framework, the lower ends of said rods 25 being adapted to engage with the corresponding shaft 7 and stud 12, as clearly shown in Fig. 1. Both ends of the shaft 7 and stud 12 are correspondingly formed so as to permit of engagement of either end of said shaft or stud with one of the depending framework bars 25, thus permitting of the hoist being employed at either the inner or outer side of the scaffold platform. The upper ends of the sides of the hoist body 1 are offset slightly, as clearly shown in Fig. 3, in order to afford clearance for the nuts 13 and the ends of stud 11 relative to the framework bars 25. In practice, four hoists will be employed in connection with each scaffold platform, one hoist being arranged at each corner of the platform, for connection with the four depending bars 25 of the supporting framework.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claim.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

A scaffold hoist comprising a frame, a drum rotatably mounted thereon, a cable cooperating with said drum, means for actuating said drum, the upper ends of the side members of said frame being offset in a vertical plane, a member extending between the upper ends of the side members of said frame and above the drum, means securing said last-named member to said side members, including a nut having an eye which engages said last named member at a portion thereof extending beyond the side members of said frame, and an upright secured to said frame side, the side members of said frame being offset sufficiently to cause said nut and upright to be out of registration.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWVARD J. GOLDEN.

Witnesses:

JosnUA R. H. Porrs, HELEN F. LILLIs. v

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

